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Adaptive defrost controller for a refrigeration device

a refrigeration device and controller technology, applied in the direction of defrosting, cooling fluid circulation, corrosion prevention, etc., can solve the problems of consuming a lot of power, refrigerator compressor to run for a longer than normal period, complex calculation of '804 patent indices,

Inactive Publication Date: 2011-04-21
DIEHL AKO STIFTUNG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009]It is accordingly an object of this invention to provide a defrost controller for a refrigeration device that schedules a defrost cycle adaptively, ...

Problems solved by technology

The operation of such a defrost cycle consumes a lot of power and, additionally, causes the refrigerator's compressor to run for a longer than normal period, to return the appliance to its desired internal temperature.
Additionally, the complex calculation of indices in the '804 patent are more intensive than can be performed by a small general purpose microcontroller.
However, such a pattern is fixed and non-adaptive to operation in an environment like an office or family, and thus, would likely experience seasonal failures.

Method used

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  • Adaptive defrost controller for a refrigeration device
  • Adaptive defrost controller for a refrigeration device
  • Adaptive defrost controller for a refrigeration device

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Embodiment Construction

[0017]Referring now to FIG. 1, there is shown a refrigerator 10 including a freezer compartment 12 and a fresh food compartment 14. Note that, although the freezer compartment 12 is illustrated in FIG. 1 as a top mounted freezer, this is not meant to be limiting, as other configurations, such as side-by-side or bottom freezer configurations, can be used without departing from the spirit of the presently described invention. It should be understood that, although not shown, the refrigerator 10 includes all of the customary components of a typical refrigerator currently including auto-defrost capabilities, such as an evaporator fan, a condenser fan, a cold control for each of the freezer compartment 12 and the fresh food compartment 14, etc.

[0018]Additionally, as illustrated in FIG. 1, the refrigerator 10 includes a small damper door 39 located over an opening between the freezer compartment 12 and the fresh food compartment 14, which is controlled by a thermostat 38. In particular, t...

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Abstract

A system and method for controlling automatic defrost of a refrigerator device are provided. The system adaptively moves the defrost cycle to low usage times based on an evaluation of compressor usage in a daily cycle.

Description

FIELD OF THE INVENTION[0001]The instant invention relates to a defrost controller for a refrigeration device, and more particularly, to a defrost controller that adaptively schedules a defrost cycle at low energy cost times without using any real “time-of-day” clock function.DESCRIPTION OF THE RELATED ART[0002]Refrigerators today typically perform a “defrost cycle” to melt the ice or frost that forms on the evaporator of the appliance. The operation of such a defrost cycle consumes a lot of power and, additionally, causes the refrigerator's compressor to run for a longer than normal period, to return the appliance to its desired internal temperature. Typical data shows that the defrost and recovery periods of operation of the refrigerator use two to four times the average energy used at other times during the refrigerator operation. As such, attempts have been made to optimize the time in which defrost occurs, to adapt to lower energy cost / usage times of day.[0003]Different refriger...

Claims

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Application Information

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IPC IPC(8): F25D21/06F25D21/00
CPCF25B47/02F25B2700/11F25D21/006F25D2700/14F25D2700/122F25D2700/123F25D2600/02
Inventor LACEY, KEVINALVORD, ROBERTKOPEC, JIM
Owner DIEHL AKO STIFTUNG
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